Tape Library issue, Catridge show frozen

Hi All,

I'm getting below error in TL.

HE: cartridge detection failed - Code 98 error during second slider movement - Code 63 HE: cartridge detection failed - Code 98 error during second slider movement - Code 63 

When I check with my TL vendor they had requested to reboot the library.

While rebooting the library do I need to stop all the backup (running\scheduled)

And when I run available media command -- found one Tape is in Frozen state.

And kindly advice me how frequent drive cleaning has to be performed.